BBH SMX Series - Overview of Achievable PI for Digital Safety Inputs

Installation manual
HB-37420-810-01-25F-EN SMX100 Installation manual.docx Page 87 of 260
Version: 25F
4.2.1.5 Overview of achievable PI for digital safety inputs
Type of sensor /
input element
Input
Parameterized /
operational tests
Achievable PI
acc. to
EN ISO 13849-1
Fault exclusion for input
element
Condition for input element
Cross
-shorting
test
With time
-out
Start test
Cyclic test
during
operation
Single-channel
I01 ... I14
b
Operation proven input element
O
O
d
All faults at the input element
Short-circuit at input/signal line
MTTF
D
= high
Connection in control cabinet or
protected routing
I01 ... I04
I09 ... I14
e
All faults at the input element
Short-circuit at input/signal line
Input element does not comply with
min. PIr
Connection in control cabinet or
protected routing
All
X
d
Getting caught
Short-circuit at input/signal line
Mainly High level required (THigh >
100 * TLow). Positively disconnecting
MTTFD = high
Connection in control cabinet or
protected routing
X
O
O
e
All faults at the input element
Short-circuit at input/signal line
Input element does not comply with
min. PIr
Connection in control cabinet or
protected routing
MTTF
D
= high
Dual-channel parallel
All
d
Short-circuit between input/signal line
Connection in control cabinet or
protected routing
MTTF
D
= medium
X
e
MTTF
D
= high